Number addition is something that we do all the time. Sometimes we add only two numbers and sometimes we add a bunch of numbers all at once. In the sample project only two numbers are added together. You will modify this project in a few ways.

ASSIGNMENT:

• Add a third addend. This will require that you display an additonal plus sign. You will also need to move things around to make room for the extra items. This might require that you shrink the signs a little.
• Make an arrow pointing upwards. It will be positioned directly below each number as it is being entered. When all three numbers have been entered, the arrow will be positioned below the answer until the user resets the activity and starts entering a new set of numbers.